Integrated circuit with calibrated pulling effect correction
US9007131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | May 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0491
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency-control circuit includes a phase frequency detector configured to receive a reference frequency signal and generate an output detection signal. The phase frequency detector can be configured to detect a difference in phase and frequency between the reference frequency signal and a feedback of the output frequency signal. The frequency-control circuit also includes a frequency divider that is configured to apply a correction voltage to a feedback of the output frequency signal, the correction voltage being a function of a pulling signal having one or more unwanted frequency components. The frequency-control circuit also includes a loop filter configured to filter the output detection signal including the correction voltage and generate a control voltage signal. The frequency-control circuit also includes a voltage-controlled oscillator configured to receive the control voltage signal and generate an output frequency signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.